The life cycles of Boyeria irene and Onychogomphus uncatus (Odonata: Aeshnidae, Gomphidae) in western Spain: a biometric study

Title:

The life cycles of Boyeria irene and Onychogomphus uncatus (Odonata: Aeshnidae, Gomphidae) in western Spain: a biometric study

Creator:

Velasco-Villanueva, Tatiana , Campos, Francisco , Norling, Ulf , and Ferreras-Romero, Manuel

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:58d86a3f-aa35-4086-8e86-f2ad51019af7
uuid:58d86a3f-aa35-4086-8e86-f2ad51019af7
doi:10.14411/eje.2018.067

Subject:

Odonata, Aeshnidae, Gomphidae, dragonfly, Boyeria irene, Onychogomphus uncatus, life cycle, permanent streams, larval sizes, seasonal regulation, voltinism, and Spain

Type:

model:article and TEXT

Format:

počítač and online zdroj

Description:

Co-occurrence of species with similar trophic requirements, such as odonates, seems to depend both on them occupying different microhabitats and differing in their life-cycles. The life cycles of the dragonflies Boyeria irene and Onychogomphus uncatus were studied in two consecutive years, mainly by systematic sampling of larvae in seven permanent head courses that constitute the upper basin of the River Águeda, western Spain, in the central part of the ranges of these two species. The size ranges of the last five larval stadia of both species were established based on biometric data. The eggs of the egg-overwintering aeshnid hatched in late spring and early summer and for the gomphid hatching peaked in middle-late summer. Both species showed mixed voltinism with "cohort splitting". B. irene had a dominant three-year development (partivoltinism), with some developing in two years (semivoltinism). O. uncatus requires four, sometimes three years to complete development (all partivoltine). B. irene larvae spent the winter before emergence in the last three, maybe four stadia, as a "summer species". O. uncatus mainly behaved as a "spring species", most larvae spending the last winter in the final larval stadium.

Language:

English

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Source:

European Journal of Entomology | 2018 Volume:115 | Number:1

Harvested from:

CDK

Metadata only:

false